Rub-apron for rub-rolls.



PATENTED MAR. 24, 1903.

H. W. TUTTLE.

` RUB APRON FOR RUB ROLLS.

APPLICATION FILED AUG. 29, 1902.

I0 MODEL.

Y 1 4 1 1,41. .A 00000000000000000000 0 00000000000. 00000000000 0. 000000000 0000 0 0 Y. 00000 0 000000000000000000 0000000000 o Oo 0g@ ooo ooo @Oo NBN@ UNITED STATES ATENT OFFICE.

HENRY W. TUTTLE, oF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR To HENRY T. o. WISE, oE PHILADELPHIA, PENNSYLVANIA.

.RU'B-APRON FOR RU B-ROLLS.

SlF.CJIJIEIKIIAJJION forming part of Lett-ers Patent No. 723,505, dated March 24, 1903.

Application led August 29, 1902.

To all whom, t 'may concern.:

Be it known that I, HENRY W. TUTTLE, a citizen of the United States, residing in the city of Philadelphia, State of Pennsylvania, have invented certain new and useful Improvements in Rub-Aprons for Rub-Rolls, of which the following is a specification, reference being had to the accompanying draw- Ings.

, My improvements relate to a method of roughening or scoring the rubbing-surface of a leather rub-apron whereby I greatly increase the eiiiciency of the apron.

In the accompanying drawings, Figure lis a plan view, and Fig. 2 an end velevation view, of a pair of rub-rolls fitted with aprons embodying my invention. Figs. 3 and 4 illustrate in two different forms the'conguration of the surface ofan apron'embodying my invention. Fig. 5 is a cross-section of such an apron. v.

The pair of rub-rolls illustrated in Figs. l and 2 do not differ, except in the character of the rubbing-surface of the apron, from rubrolls commonly in use. 'lhereare two pairs of rollers A A', B B,'each pair carrying an endless leather belt or apron, the two aprons being in contact with each other for the en. tire length of their opposite sides. It will be understood that the rollers are driven so as to cause the sides of the aprons which are in contact to travel in the same direction and at the same rate of speed and that simultaneously one or both of the pairs of rollers are caused to reciprocate laterally in such a way as to produce the rubbing or rolling of the sliver as it is drawn between the aprons.

In order that the operation of the rub-rolls shall be eective, the opposing surfaces of the aprons should be roughened sufficiently to enable them to catch hold of the projecting fibers of the sliver. Heretofore this has been done either by perforating the apron with round holes or by corrugating its sur- Serial No. 121,494. (No model.)

face by means of channels or grooves cut longitudinally in the direction in which the apron rotates. I have discovered that the efciency of the apron is greatly increased if its surface is scored by sets of parallel cuts or channels crossing each other-for example, as shown in Figs. 3 and 4. These cuts may be made either by cutting the leather with a sharp cutting-tool or they may be stamped into the leather. The sides of the cuts should have somewhat the contour disclosedby the section shown in Fig. 5. By reason of the crossing of these cuts there are produced at intervals all along the surface of the apron outstanding edges or points, such as the sides of the'diamonds or lozenges which appear in Figs. 3 and 4.. These outstandingedges catch the projecting fibers of the sliver and engage it sufficiently to greatly increase the rolling efciency, while at the same time the actual Arubbing or dat surface of the apron, which is in contact with its fellow, is not materially diminished. Another advantage results from the fact that considering the line of the progress of the sliver all parts are equally within the reach of the fiat surfaces, so that no parts of it can proceed through the rub-rolls Without being equally subjected to both the catching and the rolling action.

Havingv thus described my invention, I claim- A rub-apron for rub-rolls having its rubbing-surface scored by two sets of parallel cuts crossing each other and forming diamonds or squares, substantially as described.

In witness whereof I, HENRY W. TUTTLE, have hereunto signed my name, with two subscribing witnesses, this 27th day of August, A. D. 1902.

HENRY W. TUTTLE.

Witnesses:

JAMES H. BELL, HELEN H. Govv. 

